Annular Multi-Surface Display Device

1. An annular multi-surface display device, comprising: a display panel, with two opposite sides of the display panel being bent toward a back surface of a display area respectively and being sealed together, so that a cross section of the display panel which is obtained along a direction perpendicular to the two opposite sides forms a closed annular structure; wherein an outer surface of the display panel with the cross section being the closed annular structure is a tubular surface, and a display surface of the annular multi-surface display device is the outer surface of the display panel; wherein the display panel is provided with a transparent prism structure at least on the sealing area, and the transparent prism structure is used for changing a propagation direction of an outgoing light, wherein an upper edge of the display panel is located at one end of the two opposite sides of the display panel which are bent toward the back surface of the display area, and a certain angle is formed between the upper edge and the outer surface of the display panel; and a lower edge of the display panel is located at another end of the two opposite sides of the display panel which are bent toward the back surface of the display area, and another certain angle is formed between the lower edge and the outer surface of the display panel.

2. The annular multi-surface display device according to claim 1 , wherein the two opposite sides of the display panel are sealed together through an approach of pressing together grooves and corresponding projections that match each other, an approach of gluing the two sides together, an approach of using screws to connect the two sides together, or an approach of using a sealing board to seal the two sides together.

3. The annular multi-surface display device according to claim 1 , further comprising: at least one function groove and/or a physical function key; wherein: the function groove and/or the physical function key are disposed on a sealing area of the display panel; or the function groove and/or the physical function key are disposed on a non-display area of the display panel; or the function groove and/or the physical function key are disposed on the bent upper edge and/or the bent lower edge of the display panel; or the function groove and/or the physical function key are disposed on an inner surface of the display panel that is opposite to the outer surface of the display panel.

4. The annular multi-surface display device according to claim 1 , further comprising: a health monitoring unit; wherein: the health monitoring unit is disposed on the sealing area; or the health monitoring unit is disposed on a non-display area of the display panel; or the health monitoring unit is disposed on the bent upper edge and/or the bent lower edge of the display panel; or the health monitoring unit is disposed on an inner surface of the display panel that is opposite to the outer surface of the display panel.

5. The annular multi-surface display device according to claim 4 , wherein the health monitoring unit includes an infrared detection unit and/or a minimally invasive detection unit; wherein: the infrared detection unit is configured for monitoring a body temperature; and the minimally invasive detection unit is configured for monitoring a blood sugar level.

6. The annular multi-surface display device according to claim 1 , wherein the display panel is frameless at least on the sealing area.

7. The annular multi-surface display device according to claim 1 , wherein the display panel further comprises a circuit board, the circuit board and the display panel are connected with each other through a flexible electronic skin.

8. The annular multi-surface display device according to claim 1 , wherein at least part of the transparent prism structure protrudes from the outer surface of the display panel; and a cross section of the transparent prism structure, which is perpendicular to the outer surface of the display panel, is of a semicircular shape or a trapezoid shape.

9. The annular multi-surface display device according to claim 1 , wherein the display panel is a liquid crystal display panel, an organic light-emitting diode display panel or an electronic paper display panel.

10. The annular multi-surface display device according to claim 9 , wherein the display panel is a touch display panel.

11. The annular multi-surface display device according to claim 1 , further comprising: a camera device, a sliding slot disposed on an inner surface of the display panel that is opposite to the outer surface of the display panel, a support member for supporting a rotation of the camera device or a sliding of the camera device along the sliding slot, and a control chip for controlling movement of the support member to enable the camera device to capture images outside the display panel.

12. The annular multi-surface display device according to claim 11 , wherein the sliding slot spirally ascends along the inner surface of the closed annular structure.

13. The annular multi-surface display device according to claim 6 , wherein the transparent prism structure covers the sealing area of the two opposite sides as well as part of areas that surround the sealing area.

14. The annular multi-surface display device according to claim 1 , wherein along a direction perpendicular to the two opposite sides, a cross section of the outer surface which forms the tubular surface is of a circular shape or an oval shape.

15. The annular multi-surface display device according to claim 1 , wherein the two opposite sides of the display panel are sealed together through an approach of pressing together grooves and corresponding projections that match each other, an approach of gluing the two sides together, an approach of using screws to connect the two sides together, or an approach of using a sealing board to seal the two sides together.

16. The annular multi-surface display device according to claim 1 , wherein the display panel is frameless at least on the sealing area.

17. The annular multi-surface display device according to claim 1 , wherein the display panel further comprises a circuit board, the circuit board and the display panel are connected with each other through a flexible electronic skin.

18. The annular multi-surface display device according to claim 1 , wherein the display panel is a liquid crystal display panel, an organic light-emitting diode display panel or an electronic paper display panel.